00001 // Copyright (C) 2001, 2002, 2003, 2004 EPITA Research and Development 00002 // Laboratory 00003 // 00004 // This file is part of the Olena Library. This library is free 00005 // software; you can redistribute it and/or modify it under the terms 00006 // of the GNU General Public License version 2 as published by the 00007 // Free Software Foundation. 00008 // 00009 // This library is distributed in the hope that it will be useful, 00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 // General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with this library; see the file COPYING. If not, write to 00016 // the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 00017 // Boston, MA 02110-1301, USA. 00018 // 00019 // As a special exception, you may use this file as part of a free 00020 // software library without restriction. Specifically, if other files 00021 // instantiate templates or use macros or inline functions from this 00022 // file, or you compile this file and link it with other files to 00023 // produce an executable, this file does not by itself cause the 00024 // resulting executable to be covered by the GNU General Public 00025 // License. This exception does not however invalidate any other 00026 // reasons why the executable file might be covered by the GNU General 00027 // Public License. 00028 00029 #ifndef NTG_COLOR_HSI_HH 00030 # define NTG_COLOR_HSI_HH 00031 00032 # include <ntg/color/color.hh> 00033 00034 namespace ntg 00035 { 00036 00037 enum hsi_comp 00038 { 00039 hsi_H = 0, 00040 hsi_S = 1, 00041 hsi_I = 2 00042 }; 00043 00044 template<unsigned icomp> struct hsi_traits; 00045 template<> struct hsi_traits<hsi_H> : public interval<0,360> {}; 00046 template<> struct hsi_traits<hsi_S> 00047 { 00048 static float lower_bound() { return 0.; } 00049 static float upper_bound() { return 0.816497; } //2 / sqrt(6) 00050 }; 00051 00052 template<> struct hsi_traits<hsi_I> 00053 { 00054 static float lower_bound() { return 0.; } 00055 static float upper_bound() { return 1.7320508; } //sqrt(3) 00056 }; 00057 00058 typedef color<3,8,hsi_traits> hsi_8; 00059 typedef color<3,16,hsi_traits> hsi_16; 00060 typedef color<3,32,hsi_traits> hsi_32; 00061 00062 } // end of ntg. 00063 00064 #endif // !NTG_COLOR_HSI_HH